I have a Cisco 2811 (IOS: 12.4(3g)) on which I do some SIP application development. The device is set up as an ISDN-SIP gateway.
The issue is that if I let the outgoing call to ring for more than about 20 sec, the gateway responds with 504 Gateway Timeout and disconnects the call. The call is triggered by a SIP INVITE that I generate and everything works fine if I answer the call earlier than this timeout. I checked the logs and there is no ISDN or SIP event that triggers the 504 Gateway Timeout - it seemingly comes out of nowhere.
Do you have any idea what can cause this timeout? Do you have any advice how I can obtain more information about the cause (e.g. more logging?)
Re: 504 Gateway Timeout after about 20 sec of ringing
Eventually I solved it.
The INVITE triggering the call was slightly erroneous. It contained a Supported: 100rel header when actually there was no such support. The PRACK timeout is 500 msec and after 11 retries, the gateway terminated the call.
debug ccsip error
log provided the clue.
*Mar 5 00:25:28.964: //1435/453DA1E084A5/SIP/Error/act_sentrel1xx_wait_prack: O
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...